6.
Elements
Elements – substances that can’t be broken down
further
Examples of elements: Gold and Oxygen
Gold is an element
because it can’t be
broken down into
simpler parts.
Gold Atoms Is water an element?
NO, water can be
broken down into
hydrogen and oxygen.

7.
Periodic Table of Elements
There are 118 elements
98 of the elements are natural, the others man-made

8.
Creation of the Periodic Table
Dmitri Mendeleev was a Russian chemist who
created the first periodic table in 1869

9.
How to use a Periodic Table
weight
Atomic Number is the number of protons
Atomic symbol is a short way to write the element
Atomic weight is the average mass of the element
(protons + neutrons)

10.
Answer Questions in Notebook
1.
2.
3.
4.
Complete the table using a periodic table
In your own words, tell me the difference between matter and an atom
Is oxygen matter? Is oxygen an element?
What is the atomic number of oxygen? How many protons does an atom of Oxygen
have?
5. What is the atomic weight of aluminum?
6. What is an element?
7. Who created the first periodic table? What year did he create it?
8. What is the atomic symbol for gold?
9. What is the atomic symbol for iron?
10. If an atom has 16 protons, what type of atom must that be?
11. Are atoms mostly empty space?